Dual-Wavelength Laser Power Converters Equipped With Intermediate Bands Compatible With Highly Efficient Solar Cells
IEEE JOURNAL OF PHOTOVOLTAICS(2024)
摘要
This article propose the basic structure of laser power converters (LPCs) on the basis of intermediate-band solar cells (IB-SCs) assisted by the quantum ratchet (QR) mechanism. The LPCs convert efficiently both high-power and low-cost laser light of 800-1000 nm in wavelength and eye-safe laser light of similar to 1500 nm to electricity. Furthermore, the LPCs operate as highly efficient SCs. Thus, the proposed dual-wavelength (DW) LPCs fulfill the functions required for LPCs used for optical wireless power transmission to driving electric vehicles; the solar-cell function charges the secondary batteries anywhere during daytime. I designed the electronic band structures of the DW-LPCs and calculated the limiting conversion efficiencies, revealing that the DW-LPCs equipped with the QRs potentially yield high conversion efficiencies for each light competitive with those of the conventional single-function devices dedicated. However, new IB materials must be developed to realize the high efficiency, because the required electronic band structures are significantly different from those of previously reported IB-SC materials.
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关键词
Detailed balance,intermediate-band solar cells (IB-SCs),laser power converters (LCPs),photovoltaic cells,power transmission,quantum ratchets (QRs),semiconductor lasers
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